The arch was used by the early cultures of the Mediterranean area chiefly for underground drains, but it was the Romans who first developed and used the arch extensively in aboveground structures.

在地中海区域的早期文明中，拱形结构主要被运用在地下排水管上，但在地上建筑中首先发展并广泛使用拱门的是罗马人。

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Life aboveground is crowded.

地面上的生活很拥挤。

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Tours of the city's unique aboveground cemeteries are also popular.

这座城市特有的地市墓地游仪式也是很受欢迎的。

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But if water lingers underground for several days, subway rats may pop up aboveground, Leirs said.

FORBES: UPDATED: Rat Invasion? Will Subway Rodents Move Into Flooded NYC Neighborhoods?

Aboveground is a gorgeously symmetrical crown of green, celery-like growth radiating from the central knob to about 12 inches.

NPR: The Vegetable World's Ugly Duckling: Celeriac

Aboveground testing of nuclear bombs in the 1950s and early 1960s created elevated levels of radioactive carbon that soon became incorporated into all living things.

FORBES: Magazine Article